Shock tube study on ignition delay of multi-component syngas mixtures-Effect of equivalence ratio (PDF)
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Shock tube study on ignition delay of multi-component syngas mixtures-Effect of equivalence ratio (PDF)
- 发表刊物：
- Int J Hydrogen Energy
- 摘要：
- Ignition delays were measured in a shock tube for syngas mixtures with argon as diluent at equivalence ratios of 0.3, 1.0 and 1.5, pressures of 0.2, 1.0 and 2.0 MPa and temperatures from 870 to 1350 K. Results show that the influences of equivalence ratio on the ignition of syngas mixtures exhibit different tendency at different temperatures and pressures. At low pressure, the ignition delay increases with an increase in equivalence ratio at tested temperature. At high pressures, however, an opposite behavior is presented, that is, increasing equivalence ratio inhibits the ignition at high temperature and vice versa at intermediate temperature. The affecting degree of equivalence ratio on ignition delay is different for each mixture at given condition, especially for the syngas with high CO concentration. Sensitivity analyses demonstrate that reaction H+O2=O+OH (R1) dominates the syngas oxidation under all conditions. With the increase of CO mole fraction, reactions CO+OH=CO2+H (R27) and CO+HO2=CO2+OH (R29) become more important in the syngas ignition kinetics. With the increase of pressure, the reactions related to HO2 and H2O2 play the dominate role. The opposite influence of equivalence ratio on ignition delay at high- and intermediate- temperatures is chemically interpreted through kinetic analyses.
- 合写作者：
- Luong DH, Zhang YJ, Huang ZH
- 卷号：
- 2014, 39(11): 6034-6043
- 页面范围：
- 6034-6043
- 是否译文：
- 否
- 发表时间：
- 2014-03-25